Hansen, B. L. (1960). Work sampling for modern management. Prentice-Hall.
Cita Chicago Style (17a ed.)Hansen, Bertrand L. Work Sampling for Modern Management. Englewood Cliffs, N.J.: Prentice-Hall, 1960.
Cita MLA (9a ed.)Hansen, Bertrand L. Work Sampling for Modern Management. Prentice-Hall, 1960.
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